E-Tech EH 3 Manual De Uso página 11

Operating and installation manual
8 MAINTENANCE AND SUPPORT
WARNING: Before any repairs to the electric pump, check that the power supply is
disconnected and that it cannot be accidentally reconnected during maintenance
operations.
WARNING: If the electric pump is used for hot and/or hazardous liquids, it is essential to
inform the personnel who will carry out the repair.
In this case, clean the pump so as to ensure the safety of the operator.
WARNING: Repairing or having the electric pump repaired by personnel not authorised by
the manufacturer means losing the warranty and operating with unsafe and potentially
hazardous equipment.
WARNING: Be careful that the discharged liquid does not damage people or things.
The electric pump does not require any ordinary scheduled maintenance.
If the user wishes to prepare a scheduled maintenance plan, bear in mind that the due dates depend
on the type of liquid pumped and the running conditions.
For spare parts and maintenance documentation, contact our sales and service office. Spare parts see
(Fig. 8 and Fig. 9 and 14).
PROBLEM
9.1 The pump turns but does not deliver
9.2 The pump vibrates
9.3 The motor heats up abnormally
9.4 The pump does not deliver sufficient
pressure
9.5 The automatic circuit breaker trips
9.6 The flow is not regular
TROUBLESHOOTING TABLE:
CAUSE
a) The internal parts are obstructed by foreign bodies:
b) Inlet pipe is blocked:
c) Air is entering the inlet pipe:
d) The pump is unprimed:
e) Inlet pressure is too low and generally accompanied by cavitation
noise:
f) Voltage insufficient to power the motor:
a) Anchorage on a faulty base:
b) Foreign bodies obstructing the pump:
c) Obstruction to the pump rotation:
d) Faulty electrical connection:
a) Insufficient voltage:
b) Pump blocked by foreign bodies:
c) Ambient temperature more than +40°C:
d) Connection error in the terminal board:
a) The motor is not rotating at normal speed (foreign bodies or faulty
power supply etc.)
b) The motor is faulty:
c) The pump is not filling properly:
d) The motor rotates in reverse (three-phase motor):
e) Voltage insufficient to power the motor:
a) Thermal overload relay value too low:
b) Voltage is too low:
c) Interruption of one phase:
d) The thermal overload relay relay is faulty:
a) The inlet height is not being observed:
b) The inlet piping has a smaller diameter than the pump:
c) The suction filter and inlet piping are partially blocked:
9 DISPOSAL
Devices marked with this symbol cannot be disposed of in household waste but
must be disposed of at appropriate waste drop-off centres. It is recommended to
contact the Waste Electrical and Electronic Equipment drop-off centres (WEEE) in
the area. If not disposed of properly, the product can have potential harmful eff ects
on the environment and on human health due to certain substances present within.
Illegal or incorrect disposal of the product is subject to serious administrative and/
or criminal penalties.
10 TROUBLESHOOTING
WARNING: Before any repairs to the electric pump, check that the power supply is
disconnected and that it cannot be accidentally reconnected during maintenance
operations.
WARNING: If the electric pump is used for hot and/or hazardous liquids, it is essential to
inform the personnel who will carry out the repair. In this case, clean the pump so as to
ensure the safety of the operator.
For problems and solutions, consult table below: "TROUBLESHOOTING TABLE"
ACTION
Dismantle the pump and clean it.
Clean the pipe.
Check that the pipe is airtight right up to the pump and seal it.
Re-prime it by filling the pump. Check that the base valve is airtight.
Excessive loss of head in suction or the suction height is excessive
(check the NPSH of the installed pump).
Check the voltage of the motor terminals and the correct diameter of
the conductors.
Check and fully tighten the nuts on the bolts of the studs.
Dismantle the pump and clean it.
Check that the pump can rotate freely without any abnormal
resistance.
Check the pump connections.
Check the voltage of the motor terminals. The voltage should be ±
10% of the rated voltage.
Dismantle the pump and clean it.
The motor is designed to function at a maximum ambient
temperature of +40°C.
Check that the connections respect the diagram shown inside the
cover of the terminal box and the data plate information.
Dismantle the pump and correct the problem.
Replace it.
Repeat the priming operation.
Invert the direction of rotation by exchanging two phase wires on the
motor terminal board or the electrical control panel.
Check the voltage of the motor terminals and the correct diameter of
the conductors.
Control the intensity with an ammeter, set the value of the intensity
shown on the motor rating plate.
Check that the diameter of the conductors of the electric cable is
correct.
Check the electric cable or fuse and replace if necessary.
Replace it.
Check the installation conditions and the recommendations of this
manual.
The inlet piping should have the same diameter as the inlet mouth.
Clean the inlet duct.
ENGLISH
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